UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 13F FORM 13F COVER PAGE Report for the Calendar Year or Quarterly Ended: March 31, 2013 Check here is Amendment [ ]; Amendment Number: This Amendment (Check only one.): [ ] is a restatement. [ ] adds new holdings entries. Institutional Investment Manager Filing This Report: Name: Sage Advisory Services, Ltd. Co. Address: 5900 Southwest Parkway, Building 1, Suite 100 Austin, Texas 78735 13F File Number: 028-14814 The institutional investment manager filing this report and the person by whom it is signed hereby represent that the person signing the report is authorized to submit it, that all information contained herein is true, correct and complete, and that it is understood that all required items, statements, schedules, lists, and tables, are considered integral parts of this form. Person Signing This Report on Behalf of Reporting Manager: Name: Richard B. Williams Title: Chief Compliance Officer Phone: 512-327-5530 Signature, Place and Date of Signing: Richard B. Williams, Austin, Texas May 13, 2013 Report Type (Check only one): [X] 13F HOLDINGS REPORT. [ ] 13F NOTICE. [ ] 13F COMBINATION REPORT. List of Other Managers Reporting for this Manager: I AM SIGNING THIS REPORT AS REQUIRED BY THE SECURITIES EXCHANGE ACT OF 1934. FORM 13F SUMMARY PAGE Report Summary: Number of Other Included Managers: 0 Form 13F Information Table Entry Total: 14 Form 13F Information Table Value Total: 758668 (X1000) List of Other Included Managers: No. 13F File Number Name 01 N/A N/A FORM 13F INFORMATION TABLE Value Shares/ Sh/ Put/ Invstmt Other Voting Authority Name of Issuer Title of Class CUSIP (x$1000) Prn Amt Prn Call Dscretn Managers Sole Shared None --------- -------------- -------- ------- ------- --- ---- ------- -------- ----- ------ ----- ISH (OEF) S&P 100 ETF 46428710 88,360 1,254,576 SH Sole 352,406 0 902,170 ISH (LQD) IBOXX INV GRD CORP BD ETF 46428724 21,997 183,460 SH Sole 30,450 0 153,010 ISH (IVE) S&P 500 VALUE ETF 46428740 104,273 1,412,918 SH Sole 394,393 0 1,018,52 ISH (IEF) BARCLAYS 7-10YR TSY ETF 46428744 37,476 349,137 SH Sole 57,782 0 291,355 ISH (EFA) MSCI EAFE ETF 46428746 51,879 879,595 SH Sole 243,963 0 635,632 ISH (MBB) BARCLAYS FIXED BD FD ETF 46428858 74,507 690,265 SH Sole 113,780 0 576,485 ISH (CFT) LEHMAN CR BD FD ETF 46428862 37,208 330,533 SH Sole 54,668 0 275,865 ISH (PFF) PREF STK INDX ETF 46428868 29,128 718,843 SH Sole 268,113 0 450,730 VAN (BSV) SHORT BD FD ETF 92193782 17,561 216,825 SH Sole 0 0 216,825 VAN (VYM) HIGH DVD YL ETF 92194640 5,522 100,750 SH Sole 100,750 0 0 VAN (VWO) FTSE EMRG MKTS EQTY ETF 92204285 79,434 1,851,831 SH Sole 506,511 0 1,345,32 SPDR (SPY) S&P 500 ETF 78462F10 141,093 900,572 SH Sole 251,069 0 649,503 SPDR (GLD) GOLD TRUST ETF 78463V10 41,325 267,528 SH Sole 72,888 0 194,640 WIS (ELD) EMRG MKTS DEBT ETF 97717X86 28,905 550,262 SH Sole 217,162 0 333,100